Liquid containment device plug



FIG. 1 is a perspective view of a new design for a plug that seals a liquid containment device.

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a left side view, the right side view being a mirror image thereof.

The broken line showing of portions of the liquid containment device plug is included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM The ornamental design for a liquid containment device plug, as shown and described. 